Wavelength conversion element and projection device
US11662080B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2022 |
| Grant date | May 30, 2023 |
| Priority date | — |
| Expiry date | Jun 14, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/204
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A wavelength conversion element includes a wavelength conversion plate, a fixing ring and an adhesive layer. The wavelength conversion plate has a supporting surface. The fixing ring is disposed on the supporting surface. The adhesive layer is configured to adhere the fixing ring to the wavelength conversion plate. The adhesive layer includes a first adhesive portion and a second adhesive portion, and a density of the first adhesive portion is greater than a density of the second adhesive portion. A projection device including the aforementioned wavelength conversion element is also provided. The wavelength conversion element and the projection device provided by the invention have the advantages of short manufacturing process time and low cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.